1 the act or an instance of conserving or keeping from change, loss, injury, etc.
a protection, preservation, and careful management of natural resources and of the environment
b (as modifier) a conservation area
conservation of charge
n the principle that the total charge of any isolated system is constant and independent of changes that take place within the system
conservation of energy
n the principle that the total energy of any isolated system is constant and independent of any changes occurring within the system
conservation of mass
n the principle that the total mass of any isolated system is constant and is independent of any chemical and physical changes taking place within the system
conservation of momentum
n the principle that the total linear or angular momentum in any isolated system is constant, provided that no external force is applied
conservation of parity
n the principle that the parity of the total wave function describing a system of elementary particles is conserved. In fact it is not conserved in weak interactions
n the preservation of soil against deterioration or erosion, and the maintenance of the fertilizing elements for crop production
Dictionnaire anglais Collins English definition-Thesaurus
custody, economy, guardianship, husbandry, maintenance, preservation, protection, safeguarding, safekeeping, saving, upkeep
Dictionnaire anglais Collins English synonyme-Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"